Alfeed haid



'""LEEED'HAIneEgEnHWA N'Eizv4 .iEEsEY,: Assicjiion'f'ro THE EXCELSIOR i@ini-Eerste APPaEA'rUs coMPANY, oE NEWroEK, N.. Y..

srncrrchri'o f .neumratent Nersa'iga'; dates .my 7.51885.

l pplication led February 24,1885 (No model l v To all whose/it `mayconcern-j Beit-known that I, ALFRED. HAID, a-sub- 'ject ofthe Emperor ofGermany,` residing'at A Railway, in the county'of Union andStateoff sNew Jerseyh`aveinvented certain` new and;

' useful Improvements in Electric-Lamp Hold-v ers, of whichthe followingisa speciication, jreference being `had to the drawings accompa-I nyingand forming a part of the same. g

My invention consists .in a holder for elec-lv tric incandescent lamps,more particularly de` signed fornse in dental and surgical opera tlonsfor examiningthemouth, throat,or teeth, which is an improvement ondevicesof this f5 kind heretofore usedjn respect to certain details ofconstructionwhich' render it much poses named.

metal, .porcelain," wood, or hard rubber, pre1 ferring to use ithelatter, for: the-'reason that instruments of this kind are usually madeofthis material, viz: that itlis moreea'sily kept clean, andis softer tothe toucla'ndldoe's not produce the unpleasant sensation-which metaldoes when coming in contactwith the teeth. A .T he holder 'is tubular inform and fromsix to eight inches in length. 1t maybe made ofthe Vsainediameter throughoutor-it 'may be enlarged at the partg'in which isinserted' the lamp, this being purely a matter ofchoice.

fIhe tube is'fmade in two parts, which are joined together byscrew-threads or otherwise.

In the part that-carries .the lamp I inserta -35""--twhrwrStripswihwecappingends-whiaf-I .are normally held out ofcontact-by the reslstrip oi'jinsulating material, on one side O f .which1sa-s1nglef 1n c tal strip','and on theother iencecf-onc whichisbents'lightly. Y A push- `contact with the metal. stripsextending'into". 5o the socket when .fthe"lamp ifs-:inserted there-` in.A slot-is formed thefsocket for forcf A Imakethe holderfofanymaterialgsucli'asf button extending throughjthc holder'isused tobring the two ends together when [it is necs 4essary to close thecircuit.` The metal strips AL aresecured .tothe-insulating strip byvcement l lor otherwise, and are connected with the wires ingftheIai'npouty when it has been injured-or exhausted. These .and 'otherfeatures of my `invention are .illustrated in the accompanyingdra'wings,'in which- Y. 1 'Figiirel is a sid part of the same; andFig.-3- a central vertical Asection ofthe Ientire holder, showing theconstruction andf-arrangcmentof the parts contained therein. L' n is theniain'o'r front portion of the holder. It is composed of a'tube'with anyconvenient form of socket for an incandescent lamp,which in this case,sin'cel preferto usealamp some* what larger thanthebore-'of the tubeadmits of, 4is widened-at-the end and cut away so as within the socket,to

e View ofjmy improved holder; Fig. 2,l avvertical section of the upperthe holder is made o a material that does not t0 isastripy ofinsula'tingmaterial, to which are attached the stripD of brass or copper on oneside'and the strips lrlfof the same material on, theother. The endsofstrips E F overlap, and one is bent sc as to remain normally out ofcontact with the other. A pushbutton, G, passes through the side of thetube over the bent endof strip F. s The strips D E,

Aat the upper-.end of the strip C, are spread so 'as :to form. contactsforthe lamp within the socket..

The lamp lGrijs-an lordinary incandescent lamp ofcomparativelysmallsize, to which is securedan insulating base, H, provided with vmetalcontact-plates tofwhich the lamp-wires- `are` ljoine a'd.'` Thelampis'inserted in its socket y in such' manner as fto bring theseplates in contact vwith the strips D- A' lot, v]3L,.is formed inthe'side of the socket,

.- sithat whenithecomcs necessaryto remove the lamp, atoolmayhe'inserted under the L.- is the.;endor 'butt of theholder. iThis also consists. of a tube whichis adapted to be lamp-forforcing'itout;

. secured to the othersection by a screw-thread orothermeans. Theconductors M N from a batter a're carried-up: through a hole in the f'end o this seotiomand are secured in grooves in opposite sides of ablock, 0;,of insulating fmiatarial,` rThe :naked-endscf the wires areslipped over the ends of strips D F. Thev springs form a species ofclamp that preserves contact. Section L isthen screwed to section A,which is done without turning or twisting the conductors.

NVhen the section L is screwed up in place, itholds the conductorstogether so that the circuit cannot be broken by pulling the wiresoutside the holder.

It is important in instruments of this kind i that this should be so,and the means by which I secure this are very simple and efcient, andavoid the use of binding-screws and other forms of exterior connectionscommonly used, while they provide for the ready separation of the cordfrom the holder.

Being aware that the instruments constructed on this principle for thesame and similar purposes have been in use for a number of years, Iclaim only such parts as I have herein de-v scribed as improvementsinvented by me.

What I claim is- 1. A tubular holder for a portable or hand incandescentelectric lamp, formed in sections adapted to be united in the mannerdescribed, in combination with fixed terminals in the lamp-containingsection and loose removable terminals in the other, connected with thebattery-wires, and arranged to be joined with the xed terminals, andheld in contact therewith by uniting the two sections together,substantially as set forth. A

2. A tubular ,holder .for an incandescent lamp, formed in two sections,adapted to be united in the manner described, in combination with metalstrips D F, secured in one section, and springs P P,secured to aninsulating- Y plug and connected with the battery-wires, and fittingloosely within the other section, these parts being so constructed thatthe springs P P when joined to the strips D Fare held in contacttherewith by uniting the two sections of the holder, as and for thepurpose set forth.

In testimony whereof I have hereunto set my hand this 2lst'day ofFebruary, 1885-.

ALFRED HAID.

Witnesses: I

W. FRIsBY, F. E. HARTLEY.

